Well I finally got to see the Speed-Pro piston and the valve reliefs are a little different then the KB piston.The KB has 4 individual reliefs,the SP has 4 reliefs but they are not individual they are kinda opened up into pairs.
Called speed-pro and they don't have the cc's for the reliefs.Has anyone measured a speed-pro 295ap 307 piston? The KB is 4cc's, the SP looks to be a little more and might work out for me a little better.
We don't have sunoco out here,what is 240 premium rated at in octane?
